Portable wireless speaker



FIG. 1 is a front, top and right side perspective view of a portable wireless speaker showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating portions of the portable wireless speaker that form no part of the claim. 

CLAIM The ornamental design for a portable wireless speaker, as shown and described. 